Weldolet Run pipe schedule 1

[khansa212]

I have a situation where I have requirement of 24" x 8" weldolet (Sch 80 x Sch 80), where as I have received offer from vendor with different schedule i.e sch STD x Sch 80.
can I accept lesser schedule weldolet on run pipe schedule?
kindly advise as my branch pipe sch requirement are met.

 

[LittleInch]

This was from wermac.

So I don't think so.

The Weldolet's reinforcing characteristics are a function of the run pipe wall thickness, which in turn designates the schedule of the basic Weldolet® fitting to be used;(b) The wall thickness of the outlet or branch end must match the wall thickness of the branch pipe.


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[gwalkerb]

Weldolets® (aka integrally reinforced forged branch outlet fittings, or integrally reinforced branch connections, IRBC) are only compliant to MSS SP-97 when the schedules on both sides are the same, and only in the schedules STD, XS, XXS, and 160. Also, they are only true Weldolets® if manufactured by Bonney Forge (although everyone uses it as a generic term). But basically, if you aren't using one of the standard schedule combinations, you are required to follow the requirements of the particular piping code you are using for design of branch connections (and some piping codes still require doing reinforcement calculations even with fully compliant SP-97 fittings).

Theoretically, use of any type of IRBC with main and branch schedules not exactly as per that MSS document is outside of the scope of SP-97. However, my company allows the use of any heavier scheduled IRBCs than the actual piping, as any reinforcement requirements should be more than met. So in your case, if I was specifying a standard IRBC, I would be looking for a 24" S160 x 8" S160 fitting (assuming you are using true schedule 80, and not XS). But a STD x Sch 80 will definitely not pass in your case, regardless of compliance to MSS SP-97 or not. If you really needed to try and make this fitting work, you would need to have all of the exact dimensions from the manufacturer, then do branch connection reinforcement calculations to whatever piping code you are following. But most manufacturers are not willing to share those dimensions, they consider them to be proprietary, and would only share the dimensions that are publicly available through MSS SP-97/

 

[LittleInch]

I just double checked and 24" STD is actually sch 20 (9.53mm) vs what you want as sch 80 (30.96). Some difference.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.